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ASoC: topology: Fix route memory corruption 

commit 0298f51652 upstream.

It was reported that recent fix for memory corruption during topology
load, causes corruption in other cases. Instead of being overeager with
checking topology, assume that it is properly formatted and just
duplicate strings.

Reported-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Closes: https://lore.kernel.org/linux-sound/171812236450.201359.3019210915105428447.b4-ty@kernel.org/T/#m8c4bd5abf453960fde6f826c4b7f84881da63e9d
Suggested-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Link: https://lore.kernel.org/r/20240613090126.841189-1-amadeuszx.slawinski@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Amadeusz Sławiński 2024-06-13 11:01:26 +02:00 committed by Greg Kroah-Hartman
parent bd865c7690
commit 7c3e55d8b4
1 changed files with 3 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
sound/soc/soc-topology.c
View File

@ -1052,21 +1052,15 @@ static int soc_tplg_dapm_graph_elems_load(struct soc_tplg *tplg,
break;
}
route->source = devm_kmemdup(tplg->dev, elem->source,
min(strlen(elem->source), maxlen),
GFP_KERNEL);
route->sink = devm_kmemdup(tplg->dev, elem->sink,
min(strlen(elem->sink), maxlen),
GFP_KERNEL);
route->source = devm_kstrdup(tplg->dev, elem->source, GFP_KERNEL);
route->sink = devm_kstrdup(tplg->dev, elem->sink, GFP_KERNEL);
if (!route->source || !route->sink) {
ret = -ENOMEM;
break;
}
if (strnlen(elem->control, maxlen) != 0) {
route->control = devm_kmemdup(tplg->dev, elem->control,
min(strlen(elem->control), maxlen),
GFP_KERNEL);
route->control = devm_kstrdup(tplg->dev, elem->control, GFP_KERNEL);
if (!route->control) {
ret = -ENOMEM;
break;